by David Braben HJt
© David Braben 1987, 1988
Published worldwide by Telecomsoft
First Floor, 74 New Oxford Street
Telecomsoft is a registered trademark of
British Telecommunications pic
Insert the VIRUS disk in drive A and switch on the computer.
The game will load automatically.
Users of Amigas with Kickstart on disk should firstly boot
Kickstart version 1.2 or later.
At the Workbench prompt, insert the VIRUS disk. The game
will load automatically.
Please note that the presence of any RAM expansion or
non-standard hardware may inhibit the correct operation
of the game.
If this program is faulty, or fails to load, please return the
disk without the packaging to:
Software Returns Department
74 New Oxford Street
Rainbird Software USA
PO. Box 2227
Please include a brief note explaining the problem, and
describing your computer system.
A free catalogue of all felecomsoft products is available
from the above address, on request.
The Hoverplane can be directly controlled via the mouse
or the keyboard.
Using the Mouse
The movement ot the mouse controls the orientation of the
Hoverplane, subject to its inertia (that is - the Hoverplane
will attempt to follow the mouse, but the Hoverplane may
lag behind if the mouse is moved quickly).
Each mission commences with the mouse in the central
position, and it is the position of the mouse relative to this
central position that determines the orientation of the
The distance of the mouse from the central position
determines the declination (or angle of dip) of the
hoverplane. Thus, if you move the mouse a long way from
the central position, the hoverplane will turn upside-down.
The angle of the position of the mouse away from the
central position determines the "compass direction" the
Hoverplane will face, in the same way as it appears on the
Left button Thrust control
Right button Fire laser cannon
Using the keyboard
As an alternative to using the mouse, the Hoverplane can
also be controlled via the keyboard. Start the game by
pressing the space bar. lb change to mouse control, simply
press the thrust button on the mouse. The keys are as follows:
Fire laser cannon
Additional Key Controls
These keys are operative when using either the mouse or
the keyboard to control the Hoverplane.
M Fire homing missile
S Sound on
O. Sound off
P Pause on
O Pause off
Redefining the Keyboard
All the game control keys are redefinable - to change the
keys, press the R key whilst the Hoverplane is rotating on the
You are the pilot of the latest generation of Hoverplane -
your orders are to defend the country against waves of
attacking alien spaceships. The alien race are intent on
polluting the landscape by spraying it with a debilitating
Your Hoverplane is equipped with a long-range scanner, a
laser cannon and a limited supply of intelligent homing
Looking across the top of the game screen at your control
console, the following information is displayed:-
Quantity of spare Hoverplanes
Quantity of homing missiles carried
Current Attack Wave
Best player score achieved so far
Below this, you will see two bar readings. The orange bar
shows the amount of remaining fuel you have. The green
bar indicates the altitude above sea level.
The scanner display shows a map of the land areas (in
green) and sea (in blue). As the virus infects the landscape,
the green areas of the scanner will become a
reddish brown in colour. The Hoverplane is depicted by a
white dot. Your home base is shown as a small grey square
in the middle of the scanner, and the alien spaceships are
represented by various coloured and flashing dots.
After locating an alien spaceship on the scanner, fly
towards it and decide whether to destroy it by shooting it
with your laser cannon, or unleashing one of your homing
missiles. There is a penalty score of - 1 point incurred each
time you fire your laser cannon.
Ascore of 40 points is awarded for shooting a mutated tree.
When a homing missile is launched itwill head towards the
nearest alien spaceship. The missiles are short-burn, how-
ever, and they may lose their target.
An extra homing missile is awarOed every 5000 points.
Shield and Fuel Usage
A hit by an enemy bullet is repulsed by your Hoverplane's
shields, but the extra shield energy required means that
some of your fuel will be used. If you fly at too high an
a Ititude, your fuel supply will cut out until you drop down to
a lower altitude again. Fuel can be replenished by
landing at your home base.
A collision between two spacecraft will destroy both
An extra Hoverplane is awarded every 5000 points.
At the end of each attack wave, you will be awarded a
bonus according to the amount of the landscape which
remains uninfected by the red virus.
A totally new virus-free landscape is generated on
levels 5 and 10, and the gravity is increased progressively
on levels 3, 5 and 7.
Guide to the Allen Spacecraft
The seeder is a blue flying saucer whose function is to
spread red virus across the landscape, causing wide-
spread pollution and mutation of trees. It does this in four
1. Fly ing, and spraying the virus when over land .
2. Finding a suitable landing site, and then landing
on the ground.
3. Spraying the immediate vicinity with virus in order
to create a higher density of mutant foliage.
4. Re-launching to find a suitable new landing site
When it is about to land, is landed, or is taking off, a yellow
undercarriage is clearly visible.
50 (when landed)
A red and brown spaceship with a yellow underside, the
drone flies in a similar manner to the Hoverplane but it has
a weaker thrust capability.
Its role is to shoot the landscape and your Hoverplane, and
to attempt to mutate itself by selecting a suitable bush
and shooting it whilst within its "spray zone".
Mutant (Mutated Drone)
The mutant is red and purple with a yellow underside. It flies
in a similar way to the Hoverplane. It has a weaker thrust
capability than the Hoverplane, but more powerful than a
Its objective is to annoy and ultimately kill you. It has a
much higher firing rate than a drone, and is also more
Score for a kill: 500
Scanner blip: Flashing orange/red
Bombers are cyan and blue ships with a yellow underside.
They fly straight and level at very high speed, dropping
parachute bombs most of the time. They are detectable
from a distance by the whooshing sound they emit as they
The bomber's role is basically to spread virus, but it does so
at a much higher rate than a seeder.
The parachute bombs, which swing as they are dropped
out of the bomber have two functions:-
1. Proximity detonation on the Hoverplane .
2. Explosion above the ground, spreading
concentrated virus around the area of impact.
Score for a kill: 800
Scanner blip: Cyan/dark blue
Pests are magenta and yellow octahedrons which always
head towards your Hoverplane. Their task is simple: to
destroy you at all costs. A pest is characterised by the
distinctive twittering noises it produces and the smoke trail
that is left behind in its wake.
Score for a kill: 400
Scanner blip: Magenta
A fighter is a red, orange and yellow chevron-shaped craft
which flies in a similar manner to a mutant, but has a higher
rate-of-fire (the same as the Hoverplane). However, a fighter
has to be hit twice with the laser cannon or once with a
homing missile in order to destroy it. After it has been hit
once, its rate-of-fire is halved, and itturns a greenish colour.
Score fora kill: 200forthefirsthit
700 for the kill
Scanner blip: Flashing yellow/black
The Attractor is one of the rarest and most dangerous of the
alien spacecraft. It is distinguished by its square base and
red and white markings, as well as the deadly lightning
bolts that it shoots at the landscape below. However, the
Attractor's most powerful attribute is its tractor beam which
pulls the Hoverplane towards it and drains the
Hoverplane's energy, lb destroy an Attractor, you will have
to hit it a number of times.
Scanner blip: Flashing red/black
A secret new alien spaceship is rumoured to have joined
the invasion force, and may strike at any time. You will only
recognise this craft because it does not fit the descriptions
of any of the known aliens. Beware, as it may have a
lethal new weapons system fitted.
Scanner blip: Unknown